code: def df_energy():
      df_energy = pd.read_csv(
          os.path.join(TEST_SETS_DIRECTORY, "energy", "energy.csv"),
          parse_dates=["Year"],
      )
  
      return df_energy
  
imports: import os
  import numpy
  import pandas
  import pytest
  import pandas_bokeh
label_desc: Use image node_id 5 for calling a global function with example usage: df_energy() and returns: df_energy